Patent GB-1008973-A (GB)
Title: Lubricant additives and processes for preparing same
IPC: C07F9/04
Filed: 1963-08-22
Abstract: A lubricant oil composition includes an additive which comprises the reaction product of a phosphosulphurized hydrocarbon, a polyamine and an alkenyl-substituted aliphatic dicarboxylic acid or its anhydride, which product is substantially free from water and acidic by-products (see Division C3).  Compositions exemplified are (1) a solvent extracted SAE 20 base oil with zinc dialkyl dithiophosphate* and the reaction product of a phosphosulphurized polybutene with a polybutene succinic anhydride further reacted with tetraethylene pentamine (* alkyl groups comprise isopropyl and mixed octyl groups); and (2) a solvent extracted SAE 10 oil with zinc dialkydithiophosphate*, a polymeric fatty acid anti-rust agent, and the reaction product of a phosphosulphurized polybutene with tetraethylene pentamine further reacted with a polybutene succinic anhydride in an SAE 5 oil.  The reaction product in (2) may be modified by reacting either the intermediate or the final products with boric acid.ALSO:A lubricant oil additive comprises the reaction product of a phosphosulphurized hydrocarbon, a polyamine and an alkenyl-substituted aliphatic dicarboxylic acid or its anhydride, which product is substantially free from water and acidic by-products.  The phosphosulphurized hydrocarbon may be made by heating a normally liquid hydrocarbon with a phosphorus sulphide e.g. P2S5.  The alkenyl-substituted aliphatic dicarboxylic acid or anhydride may be made by heating a normally liquid hydrocarbon with, for example, maleic anhydride.  The polyamine preferably has the formula H2N(CH2CH2NH)xH where x is an integer from 1 to 8 and, of a number listed, tetraethylene pentamine is preferred.  Suitable normally liquid hydrocarbons are:-monoolefin polymers or mixtures of mono- and isomono-olefin polymers of M.W. of 150 to 50,000, e.g. polymers of a mixture of iso-butylene, butylenes and butanes from petroleum gases or polymers obtained by the liquid phase polymerization of substantially C3 hydrocarbon mixtures; bright stock residuums, lubricating oil distillates, petrolatums or paraffin waxes; high M.W. olefinic hydrocarbons such as cetene, cerotene, melene and mixed high M.W. alkenes from cracked petroleum oils; and olefins of at least 20 carbon atoms.  In the examples the lubricant oil additive is prepared (1) by reacting a phosphosulphurized polybutene with a polybutene succinic anhydride under nitrogen and then reacting the product with tetraethylene pentamine and finally stripping with nitrogen to remove water and acid by-products, or (2) by reacting a phosphosulphurized polybutene with tetraethylene pentamine, stripping with nitrogen, reacting the product with a polybutene succinic anhydride in an S.A.E.5 oil and finally stripping again with nitrogen.  The products may be modified by reacting with boric acid before stripping.  Lubricant compositions (see Division C5) containing the additive are exemplified.ALSO:A lubricant oil additive comprises the reaction product of a phosphosulphurized hydrocarbon, a polyamine and an alkenyl-substituted aliphatic dicarboxylic acid or its anhydride, which product is substantially free from water and acidic by-products.  The phosphosulphurized hydrocarbon may be made by heating a normally liquid hydrocarbon with a phosphorus sulphide, e.g. P2S5.  The alkenyl-substituted aliphatic dicarboxylic acid or anhydride may be made by heating a normally liquid hydrocarbon with, for example, maleic anhydride.  The polyamine preferably has the formula H2N(CH2CH2NH)xH where x is an integer from 1 to 8 and, of a number listed, tetraethylene pentamine is preferred. Suitable normally liquid hydrocarbons are: mono-olefin polymers of M.W. of 150 to 50,000 e.g. polymers of a mixture of iso-butylene, butylenes and butanes from petroleum gases or polymers obtained by the liquid phase polymerization of substantially C3 hydrocarbon mixtures; bright stock residuums, lubricating oil distillates, petrolatums or paraffin waxes; high M.W. olefinic hydrocarbons such as cetene, cerotene, melene and mixed high M.W. alkenes from cracked petroleum oils; and olefins of at least 20 carbon atoms.  In the examples, the lubricant oil additive is prepared (1) by reacting a phosphosulphurized polybutene with a polybutene succinic anhydride under nitrogen and then reacting the product with tetraethylene pentamine and finally stripping with nitrogen to remove water and acid by-products, or (2) by reacting a phosphosulphurized polybutene with tetraethylene pentamine, stripping with nitrogen, reacting the product with a polybutene succinic anhydride in an S.A.E. 5 oil and finally stripping again with nitrogen.  Preparation (2) may be modified by reacting the intermediate product or the final product with boric acid before stripping.  Lubricant compositions (see Division C5) containing the additive are exemplified.